55147512 has 64 divisors (see below), whose sum is σ = 162662400. Its totient is φ = 15246720.

The previous prime is 55147493. The next prime is 55147513. The reversal of 55147512 is 21574155.

It is a self number, because there is not a number n which added to its sum of digits gives 55147512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55147513) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87 + ... + 10502.

It is an arithmetic number, because the mean of its divisors is an integer number (2541600).

Almost surely, 2^55147512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55147512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81331200).

55147512 is an abundant number, since it is smaller than the sum of its proper divisors (107514888).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55147512 is a wasteful number, since it uses less digits than its factorization.

55147512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10636 (or 10632 counting only the distinct ones).

The product of its digits is 7000, while the sum is 30.

The square root of 55147512 is about 7426.1370846491. The cubic root of 55147512 is about 380.6349311340.

The spelling of 55147512 in words is "fifty-five million, one hundred forty-seven thousand, five hundred twelve".